43 lines
1.2 KiB
C++
43 lines
1.2 KiB
C++
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#include <cstdint>
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#include <iostream>
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#include "dpf.hpp"
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/// Three-evaluator point DPF (ePrint 2024/1658 Fig. 3). Each key is a Shamir
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/// share; open with any two (or all three) via `dpf::reconstruct`.
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int main()
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{
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using Input = std::uint8_t;
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const Input alpha = 42;
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const dpf::fp61 beta{7};
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//! [eval-dpf3-point]
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auto [k1, k2, k3] = dpf::make_dpf3(alpha, beta);
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const dpf::fp61 y1 = dpf::eval_point(k1, alpha);
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const dpf::fp61 y2 = dpf::eval_point(k2, alpha);
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const dpf::fp61 y3 = dpf::eval_point(k3, alpha);
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const dpf::fp61 opened = dpf::reconstruct(
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dpf::as_share(k1, y1), dpf::as_share(k2, y2), dpf::as_share(k3, y3));
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//! [eval-dpf3-point]
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if (opened != beta)
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{
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std::cerr << "dpf3 at the programmed input\n";
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return 1;
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}
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const dpf::fp61 z1 = dpf::eval_point(k1, Input{41});
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const dpf::fp61 z2 = dpf::eval_point(k2, Input{41});
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const dpf::fp61 z3 = dpf::eval_point(k3, Input{41});
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if (dpf::reconstruct(dpf::as_share(k1, z1), dpf::as_share(k2, z2),
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dpf::as_share(k3, z3))
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.raw()
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!= 0)
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{
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std::cerr << "dpf3 off the programmed input\n";
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return 1;
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}
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std::cout << opened.raw() << "\n";
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return 0;
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}
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